Replace Elements with Greatest Element on Right Side
A easy-tier problem at 72% community acceptance, tagged with Array. Reported in interviews at Zoho and 0 others.
You're staring at an array and need to replace each element with the greatest value to its right. Sounds simple until you realize the naive approach tanks on large inputs. Zoho has asked this one. It's the kind of problem that separates candidates who think linearly from those who see the whole picture at once. The trick isn't complicated, but miss it and you'll code yourself into a corner during the assessment. StealthCoder spots the pattern instantly if you blank on the traversal direction.
Companies that ask "Replace Elements with Greatest Element on Right Side"
Replace Elements with Greatest Element on Right Side is the kind of problem that decides whether you pass. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds. Invisible to screen share. The proctor sees nothing. Built by a senior engineer who knows the OA is theater. This is the script.
Get StealthCoderThe catch here is direction. Most candidates scan left-to-right, building a max as they go, then get stuck trying to update values they've already passed. The real solution reverses it: traverse right-to-left, track the running maximum, and update each element before moving left. This single pass handles everything. Common failure: trying to modify and read from the same array simultaneously without tracking what you've already seen. The algorithm is O(n) time, O(1) space if you ignore output array space. If you hit this live and your first instinct was nested loops or precomputation, StealthCoder surfaces the one-pass solution immediately, invisible to the proctor.
Pattern tags
You know the problem.
Make sure you actually pass it.
Replace Elements with Greatest Element on Right Side recycles across companies for a reason. It's easy-tier, and most candidates blank under the timer. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds. Built by a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Replace Elements with Greatest Element on Right Side interview FAQ
How hard is this really for an easy problem?+
It's easier than the acceptance rate (71%) might suggest. Once you see the right-to-left scan, it clicks fast. The difficulty isn't the logic, it's the initial direction instinct. Most people default to left-to-right and waste time backtracking.
Do I actually need extra space for this?+
No. Traverse right to left, track a running max, and update in place. The output array doesn't count against space limits in most interviews. One variable for max, one pass through the array. Done.
Will this pattern come up again?+
Yes. Right-to-left scanning appears in stack problems, monotonic decreasing sequences, and problems where future context matters more than past context. Once you own this pattern, you'll spot it elsewhere.
Is this still asked at companies beyond Zoho?+
The input shows Zoho as the named source, but this is a canonical array pattern. It's likely asked elsewhere. It's simple enough to appear as a warm-up round problem at many companies.
What's the most common mistake candidates make?+
Overcomplicating it. People build a sorted version, precompute suffix maxes, or try two passes when one reversed pass solves it. Also, off-by-one on the last element. The last element's right max is always -1.
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